According to perturbative QCD, nuclear quasiexclusive reactions should be $\ensuremath{\propto}{A}^{1}$ at asymptotically large momentum transfer. Here we analyze how the asymptotic prediction is modified finite energies by expansion of quark systems as they become hadrons and exit from nucleus. We find that phenomenon transparency apparent in presently fesible experiments, but degree sensitive model.

Since the origin of magnetism in ZnO-based diluted magnetic semiconductors (DMSs) is still controversial, this work, we presented a detailed study on magnetic, structural, and electronic properties wurtzite DMS systems with point complex intrinsic defects. Two outer electrons from neutral oxygen vacancy (VO) occupy a1 orbital, making inducted moment to be zero, while cluster including three VOs leads ∼1 μB. The system Zn (VZn) 1.65 When two VZns different relative distances were created...

Physical properties of U3Si2 with non-magnetic, ferromagnetic, and anti-ferromagnetic structures are predicted using DFT + U Hubbard-U values from 0 to 4 eV. The stability is compared its neighboring phases, U3Si USi. results emphasize the importance magnetism. For non-magnetic a very large value required accurately reproduce physical constants. However, electronic structure studied magnetic states different values, it clear that incorrect use model for paramagnetic because resulting nearly...

The temperature-dependent effective thermal conductivity of UN-X-UO2 (X = Mo, W) nuclear fuel composite was estimated. Following the experimental design, calculated using Finite Element Modeling (FEM), and compared with analytical models for 10%, 30%, 50%, 70% (in mass) uncoated/coated UN microspheres in a UO2 matrix. FEM results show an increase as mass fraction increases – from 1.2 to 4.6 times reference at 2000 K. agree estimated by FEM. also that Mo W coatings have similar behaviors,...

UN-UO2 composite fuel is considered an advanced technology (ATF) option to overcome the low oxidation resistance of UN fuel. However, interaction between UO2 and limits performance such composites. A possible way avoid this encapsulate with a material that has high melting point, thermal conductivity reasonably neutron cross-section. Amongst many candidates, refractory metals can be first option. In study, detailed investigations in UN-X-UO2 systems (X = V, Nb, Ta, Cr, Mo, W) were performed...

The vacuum activation assisted hydrogenation-dehydrogenation (HDH) method was applied to fabricate the high-purity and ultrafine nuclear grade zirconium powders. An additional process specially used prior hydrogenation suppress oxygen content increase hydrogen content. It found that this extra not only efficient in shortening length of whole process, but also critical improving quality Zr detailed investigations on mechanism indicated merits could be both attributed removal sources sponge...

Uranium mononitride (UN)-uranium dioxide (UO2) composites are being considered as an innovative advanced technology fuel option for light water reactors, where optimal balance between the chemical advantages of UO2 and thermal neutronic properties UN is struck. However, effect extent interactions during sintering operation still open issues importance. A possibility to avoid these protect phase before UN-UO2 by encapsulating UN. This protective material must have a high melting point,...

Room temperature ferromagnetism (RTFM) was observed in unirradiated rutile TiO2 single crystals prepared by the floating zone method due to oxygen vacancy (VO) defects. D-D neutrons mainly collide elastically with TiO2, producing VO, titanium vacancies (VTi) and other point defects; density kind of defect is related neutron irradiation fluence. used regulate concentration type defect, avoiding impurity elements. As fluence increases, saturation magnetization (Ms) first then decreases...

A novel method is reported to synthesize various pyrazolones through transition-metal-free and redox-neutral 1°, 2°, or 3° C(sp3)–H carbonylative cyclization using 1 atm of CO2 as a green carbonyl source, featuring good functional group tolerance, broad substrate scope, facile scalability, easy product transformation. The utility this could be demonstrated by the applications in preparing useful synthetic intermediates bioactive compounds.

Through the construction of a new generation emergency command system, coordinate professional resources, access meteorological data from enterprise service center and on-site video unified video, break barriers, realize GIS display capability disaster layer access, monitor operation status power grid equipment in an all-round map. multi-dimensional perception such as platforms, fault research is assisted, structured early warning or response plan adopted to guide improve ability each...

Multimodal optimization is a difficult problem in the field of evolutionary computation due to multiple attraction basins. The balance exploration and exploitation important performance algorithm multimodal problems. In this paper, novel algorithm, named KbP-LaF-CMAES, proposed based on Covariance Matrix Adaptation Evolution Strategy (CMA-ES) cope with problem. Two strategies, leader follower (LaF) mechanism homotopic convex transformation mechanism, are introduced algorithm. first stage LaF...

In this paper, an orthogonal learning (OL) design whale optimization algorithm (WOA) with clustering mechanism, named OLWOA, is proposed to solve the complex continuous problems. algorithm, OL, as effective strategy utilize prior search information (experience), utilized overcome disadvantages of basic WOA, which converges slowly and falls into local optimum easily. The clustering-based mechanism guides humpback whales toward interesting area by propagating good solutions from one cluster...

Through the research of digital modulation signals, we find that signal would produce a series spectrum lines after specific nonlinear transformation. Therefore, this characteristic has certain potential in recognition. In paper, first, analyze mechanism signals (4PAM、BPSK、QPSK、8PSK、2FSK、4FSK), then, use AR model to extract characteristics identify different signals. end above-mentioned six are simulated MATLAB environment. Simulation results show recognition through method good stability...

Uranium silicide, U3Si2, is considered as an advanced nuclear fuel for commercial light water reactors with improved accident tolerance well competitive economics. Nd employed a local burnup indicator conventional oxide fuels due, among other reasons, to its low mobility in the UO2 matrix and high fission product yield. As part of studies necessary determine whether can be candidate U3Si2 concept fuel, we investigate U3Si2. In this work, density functional theory (DFT) calculations are...